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益生素对仔猪生长性能、血液生化指标及免疫功能的影响
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摘要
本研究用仔猪为试验动物,探讨在饲料中添加华邦益生素对仔猪生长性能、血液生化指标及免疫指标的影响,研究主要分以下几部分。
     1华邦益生素对仔猪生长性能影响
     选取108头杜长大仔猪,分为4个组:高剂量组在基础日粮上添加2.5g/kg的华邦益生素;中剂量组在基础日粮上添加2.0g/kg的华邦益生素;低剂量组在基础日粮上添加1.2g/kg的华邦益生素,空白对照组饲喂基础饲料。饲喂周期为28d,并于试验前后进行体重的测定,试验期间记录各组采食量,观察仔猪腹泻情况。结果表明:饲料中添加中剂量华邦益生素可以提高断奶仔猪的日增重(P<0.05)、降低料肉比(P<0.01),并降低仔猪腹泻率(P<0.05);高、低剂量添加组的平均日增重、饲料转化率均优于空白对照组,高、中、低华邦益生素添加剂量组均能够降低仔猪的腹泻率分别降低了4.67%、5.86%、3.85%,其中中剂量组的腹泻率与空白对照组差异显著(P<0.05)。结论:断奶仔猪饲粮中添加一定量的华邦益生素,能够提高仔猪的生长性能。
     2华邦益生素对仔猪血液生化指标的影响
     四个处理组中的每个重复随机取3份血清,合计血清36份,对血清ALT、AST、AKP、淀粉酶活性和血清尿素氮含量的测定。结果表明:中剂量组(2.0g/kg)添加组为最优组,能够降低ALT和AST活性,提高AKP和α-淀粉酶活性活性,降低血清尿素氮含量;高、低剂量组优于空白对照组,但不如中剂量组。结论:华邦益生素对改善仔猪血液生化指标:ALT、AST、AKP、α-淀粉酶活性及血清尿素氮有一定作用。
     3华邦益生素对仔猪免疫指标的影响
     对血清免疫球蛋白IgA、IgM、IgG和猪瘟抗体水平进行测定。结果表明:试验组的免疫球蛋白中抗体IgM、IgA及IgG的含量和猪瘟抗体水平均比空白对照组有一定的提升,且高、中剂量组的IgM、IgG和猪瘟抗体水平与空白对照组差异显著(P<0.05)。结论:在断奶仔猪的日粮中添加一定量的华邦益生素,对提高机体的免疫力及抗体水平有一定的作用。
1 Effects of HuaBang probiotic on the growth performance of piglets
     108 weaned piglets(Large White×Duroc) were randomly assigned to four feeding groups.The control group was fed basal diet, high-dose group was fed basic diet with 2.5g/kg probiotic, middle-dose group was fed basic diet supplemented with 2.0g/kg probiotic and low-dose group was fed basic diet added with 1.2g/kg probiotic. The experiment lasted 28 days. During this period,recording average daily weight gain、calculating feed conversion rate and diarrhea ration of all piglets. Results:Adding middle-dose probiotic to the diet can increase average daily gain (P<0.05), reduce feed-meat ratio (P<0.01), and reduce diarrhea ration(P<0.05); high-dose group and low-dose group showed significantly better weight gain and feed conversion ratio compared to the control group. High-dose group、middle-dose group、and low-dose group can reduce the diarrhea ration of the piglets 4.67%、5.86% and 3.85%, the middle-dose group showed significantly differences (P<0.05) compared to the control group (P<0.05).Conclusion:The performance of piglets had been significantly improved by adding a certain amount of probiotic to weaned piglets.
     2 Effects of HuaBang probiotic on the blood biochemical indices of piglets
     After the experiment, blood samples were taken from four groups test for determining ALT、AST、AKP、Amylase activity in serum and the level of serum urea nitrogen. Results:The middle-dose group (2.0g/kg) was the optimal group which can significantly decrease the activity of ALT and AST, increase the activity of AKP and a-Amylase, decrease the level of serum urea nitrogen. And the effect of the high-dose group was better than the blank control group, less than middle-dose group. Conclusion:The results of this experiment showed that supplementation of probiotic to weaned piglet diets during the experiment period significant affected the blood biochemical indices:ALT、AST、AKP、α-Amylase and serum urea nitrogen of piglets.
     3 Effects of HuaBang probiotic on immune organ indexes of piglets.
     After the experiment, blood samples were taken from four groups test for determining the content of serum immunoglobulin of IgA、IgM、IgG and the antibody level of Classical Swine Feve. Results:The content of serum immunoglobulin of IgA、IgM、IgG and the antibody level of Classical Swine Feve in the groups with supplemented with probiotic bacteria were higher than control group. And the level of IgM、IgG and Classical Swine Feve antibody showed significantly differences (P<0.05) between the high-dose group and middle-dose group. Conclusion:The results of this experiment showed that supplementation of probiotic to the basic diet improved the level of immunity and antibody.
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